function moveElement(elementID, final_x, final_y, interval) {
	var elem = document.getElementById(elementID);
	if(elem.movement) {
		clearTimeout(elem.movement);
	}
	if(!elem.style.left) {
		elem.style.left = "0px";
	}
	if (!elem.style.top) {
		elem.style.top = "0px";
	}
	var xpos = parseInt(elem.style.left);
	var ypos = parseInt(elem.style.top);
	if(xpos == final_x && ypos == final_y) {
		return true;
	}
	if(xpos < final_x) {
		dist = Math.ceil((final_x - xpos) / 10);
		xpos = xpos + dist;
	}
	if(xpos > final_x) {
		dist = Math.ceil((xpos - final_x) / 10);
		xpos = xpos - dist;
	}
	if(ypos < final_y) {
		dist = Math.ceil((final_y - ypos) / 10);
		ypos = ypos + dist;
	}
	if(ypos > final_y) {
		dist = Math.ceil((ypos - final_y) / 10);
		ypos = ypos - dist;
	}
	elem.style.left = xpos + "px";
	elem.style.top = ypos + "px";
	var repeat = "moveElement('" + elementID + "'," + final_x + "," + final_y + "," + interval + ")";
	elem.movement = setTimeout(repeat, interval);

}